üherakulised mikroskoopilised organismid (protistid), kelle rakke ümbritseb kahest karbitaolisest poolmest koosnev ränikest, algas unicelulares de la especie Bacillarieae que poseen paredes celulares de sílice, a phylum of the Protoctista (formerly called the Bacillariophyta) whose members are unicellular algae found in freshwater, the sea, and soil
